# A162791 (b-file synthesized from sequence entry) 0 1 1 16 2 240 3 3480 4 50400 5 729120 6 10547880 7 152586000 8 2207316720 9 31931110680 10 461916453600 11 6682097644320 12 96663430749480 13 1398336169885200 14 20228374156231920 15 292624284336944280 16 4233111921066520800